File indexing completed on 2023-03-17 11:01:02
0001 #include "FastSimulation/Utilities/interface/RandomEngineAndDistribution.h"
0002
0003 #include "FWCore/ServiceRegistry/interface/Service.h"
0004 #include "FWCore/Utilities/interface/RandomNumberGenerator.h"
0005 #include "FWCore/Utilities/interface/Exception.h"
0006
0007 #include "CLHEP/Random/RandomEngine.h"
0008
0009 RandomEngineAndDistribution::RandomEngineAndDistribution(edm::StreamID const& streamID) : engine_(nullptr) {
0010 edm::Service<edm::RandomNumberGenerator> rng;
0011 if (!rng.isAvailable()) {
0012 throw cms::Exception("Configuration") << "RandomNumberGenerator service is not available.\n"
0013 "You must add the service in the configuration file\n"
0014 "or remove the module that requires it.";
0015 }
0016 engine_ = &rng->getEngine(streamID);
0017 }
0018
0019 RandomEngineAndDistribution::RandomEngineAndDistribution(edm::LuminosityBlockIndex const& luminosityBlockIndex)
0020 : engine_(nullptr) {
0021 edm::Service<edm::RandomNumberGenerator> rng;
0022 if (!rng.isAvailable()) {
0023 throw cms::Exception("Configuration") << "RandomNumberGenerator service is not available.\n"
0024 "You must add the service in the configuration file\n"
0025 "or remove the module that requires it.";
0026 }
0027 engine_ = &rng->getEngine(luminosityBlockIndex);
0028 }
0029
0030 RandomEngineAndDistribution::~RandomEngineAndDistribution() {}
